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Using the results from the Tulip log analysis script for the last 3 days we can identify the hosts and their success percentages. We opted to disable all the hosts which were having success less than 20%, and to enable the ones with success rate greater than 20%. The above mentioned tulip-tuning.pl script is in /afs/slac.stanford.edu/package/pinger/tulip and it performs the listed functions. It uses the LWP package to call reflector.cgi?function=log&days=3 to access the webpage, the Tulip log analysis data for the last 3 days and downloads the analyzed tulip log file by requesting it from reflector using http://www-wanmon.slac.stanford.edu/cgi-wrap/reflector.cgi?function=analyze&days=days and saves it in a file and then parses the output to get: for option ability=1, the faulty (landmarks (i.e. the ones below 20% success rate by default) updating the database to disable such hosts; or option ability=0 the landmarks with a success rate greater than 20% and re-enables them in the database. It (tulip-tuning.pl) is run twice nightly (see the trscrontab) once to disable non working landmarks, once to enable landmarks that are now working again. The runs are before the sites.xml or sites-disabled.xml are created and specify using the tulip log file analyzed for the last 3 days.
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